#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>

int is_leap_year(int y) {
	if (((y % 4 == 0) && (y % 100 != 0)) || (y % 400 == 0))
		return 1;
	else
		return 0;
	
}
int main() {
	int year = 0;
	for (year = 1000; year <= 2000; year++) {

		if (is_leap_year(year) )
		{
			printf("%d  ", year);
		}
	}



	return 0;
}